Flights from London to Seattle Tacoma

Our cheapest offers for flights from London to Seattle Tacoma

Here you can compare cheap flights from London (LON) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
London
Seattle-Tacoma
Outbound
24/12/25
1 Stopover (ORD)
OS7849, OS7703
16h 21min
Return
13/01/26
1 Stopover (ORD)
LH7537, LH9355
13h 05min
Austrian Airlines ?
£484
Best option
London
Seattle-Tacoma
Outbound
31/01/26
direct
BA0053
10h 05min
Return
03/02/26
direct
BA0052
09h 35min
British Airways ?
£518
London
Seattle-Tacoma
Outbound
22/12/25
1 Stopover (FRA)
LH0923, DE2032
16h 10min
Return
10/01/26
1 Stopover (FRA)
DE2033, LH0910
14h 10min
Lufthansa, Condor
£950
London
Seattle-Tacoma
Outbound
31/01/26
1 Stopover (KEF)
FI0451, FI0681
12h 45min
Return
03/02/26
1 Stopover (KEF)
FI0680, FI0450
12h 15min
Icelandair
£484
London
Seattle-Tacoma
Outbound
31/01/26
1 Stopover (KEF)
FI0451, FI0681
12h 45min
Return
03/02/26
1 Stopover (KEF)
FI0680, FI0450
12h 15min
Icelandair
£488
London
Seattle-Tacoma
Outbound
31/01/26
1 Stopover (KEF)
FI0451, FI0681
12h 45min
Return
03/02/26
1 Stopover (KEF)
FI0680, FI0454
20h 55min
Icelandair
£489
London
Seattle-Tacoma
Outbound
31/01/26
1 Stopover (KEF)
FI0451, FI0681
12h 45min
Return
03/02/26
1 Stopover (KEF)
FI0680, FI0450
12h 15min
Icelandair
£523
London
Seattle-Tacoma
Outbound
31/01/26
direct
AY5451
10h 05min
Return
03/02/26
direct
AY5450
09h 35min
Finnair
£525
London
Seattle-Tacoma
Outbound
18/03/26
1 Stopover (MUC)
LH4205, LH0488
13h 40min
Return
20/04/26
1 Stopover (FRA)
LH0491, LH0904
12h 20min
Lufthansa ?
£528
London
Seattle-Tacoma
Outbound
20/03/26
1 Stopover (KEF)
FI0451, FI0681
12h 45min
Return
17/04/26
1 Stopover (KEF)
FI0680, FI0454
20h 35min
Icelandair
£530
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from London to Seattle Tacoma

Favourite airline: Icelandair
The most popular airline for flights from London to Seattle-Tacoma is Icelandair.
Icelandair
50 %
Turkish Airlines
18 %
British Airways
10 %
Stopover flights are the cheapest connection
Direct flights on this route are £454.00 more expensive on average than flights with a stopover.
non stop flight
1 stop
2 stops
09h 45min
15h 35min
17h 30min
£ 973
£ 519
£ 1.330
Favourite connection: via Reykjavik-Keflavik
Stopover flights on this route are especially popular via Reykjavik-Keflavik, making up 54 % of bookings.
Route
bookings
1 stopover Reykjavik-Keflavik International
15h 35min, from £ 519
54 %
1 stopover Istanbul
32h 05min, from £ 891
19 %
Direct flights
09h 45min, from £ 973
16 %

Important flight information

Flight information: London - Seattle-Tacoma

Outbound and return from £ 483,22
Flight duration min. 09:50 / max. 09:55
Return flight duration min. 09:20/ max. 09:30
Distance 7721 km
Flights per week 19
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport Airport Seattle-Tacoma (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price